| Modeling video hyperlinks with hypergraph for web video reranking |
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International Multimedia Conference
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Proceeding of the 16th ACM international conference on Multimedia
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Vancouver, British Columbia, Canada
SESSION: Content track short papers session 1: content analysis
table of contents
Pages 659-662
Year of Publication: 2008
ISBN:978-1-60558-303-7
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Authors
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Hung-Khoon Tan
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City University of Hong Kong, Kowloon, Hong Kong
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Chong-Wah Ngo
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City University of Hong Kong, Kowloon, Hong Kong
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Xiao Wu
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City University of Hong Kong, Kowloon, Hong Kong
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ABSTRACT
In this paper, we investigate a novel approach of exploiting visual-duplicates for web video reranking using hypergraph. Current graph-based reranking approaches consider mainly the pair-wise linking of keyframes and ignore reliability issues that are inherent in such representation. We exploit higher order relation to overcome the issues of missing links in visual-duplicate keyframes and in addition identify the latent relationships among keyframes. Based on hypergraph, we consider two groups of video threads: visual near-duplicate threads and story threads, to hyperlink web videos and describe the higher order information existing in video content. To facilitate reranking using random walk algorithm, the hypergraph is converted to a star-like graph using star expansion algorithm. Experiments on a dataset of 12,790 web videos show that hypergraph reranking can improve web video retrieval up to 45% over the initial ranked result by the video sharing websites and 8.3% over the pair-wise based graph reranking in mean average precision (MAP).
REFERENCES
Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.
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